Piano-tool.



JQN. BROWN. 1 PIANO TOOL.

APPLICATION I'll-E15 NOV. 16. 1903.-

PATENTED JAN. 1, 1907.

2 SHEETS-SHEET l.

.ii weizfzw" v Ls v To (all whom it. may concern: I E-Be it knownthat I, JULIUs N. BROWN, of

UNITED STATES Specificationoi ietters Patent.

PATENT OFFICE.

Patent d Jan. 1, 1907.

Ahplication filed Novemhei" 16,1903. sri rntfitilsoz Chicago, Illinoisy'. have invented certain new and'use'ful' Improvements in Tools for the.

Use of Piano Tuners and Makers, whereofthe following is a specification.

" 'In the adjustment of a piano-action, both beforeand atter'itleaves the factory, it is regulate the spacing.- of the hammers and a s'of to correct twisted hammer-shanks. The hammer shanks "be-l ing made of w'ood;this has commonly been" done by'means ofyheat applied by an.alcohol or Bunsen flame, the shanks being bent into frequently necessary t shape'under the influence of the heat.'. I

hav eidiscovered'that these operations can be performed without the use of'heat, and I ave invented a tool for performing them...

This tool I make. in the form of pliers, and I havfeso constructed that "a variety of other operations can'be performed with it in addition to those named.

Inthe accompanying drawings I have shown a pliercontaining my invention in what: I

now consider its best'form.

Figure 1 is a side elevation of the tool. Fig. 2 is a to elevationof' same. Fig. 3 is a top view of t e lower nose of Fig. 1. Fig. 4 is an end 'view of magma view of the,to nose of Fig. 1. section at 6 6 0 Fig. 1. 7.7 of Figi'i'." Fig.8 is'a view from below of the end of ,thej lower. handle of Fig. 1. Fig. 9 is an end view of th'eg'same. Fig. 10 is a side elevation of the-pli'e'r witha modified nose.

Fig. 11 is" a .to elevation of thesame. Fig.-

12 shows .theiaceof tl ie lower jaw of same. Fig. 13*showsthefaceof the upper jaw of.

same. Fig. 14 is an end view oi the ,nose

of same. In thesevarious figures, 1 and 2 are registering semigrooves,and 3" and 4 are registering semigrooves, in the nose of thepliers. These registering grooves form two holes of approximately circular crosssection, and-of about the size.of or a trifle larger than a hammer-shank. The semigrooves 1 and 2 are both curved upward, as seen in' Fig. 7, ,so. that the bottom .of 1 presents a concave appearance, tom of 2 presents a convex appearance. The convexity of 2 is greater than the concavity of 1, so that the hole formed by the grooves is smaller in the middle than at the ends. In

it is applied to the s Fig. '5 is an under 1 Fig. 6is a Fig. 7 is asection at and the bot-v the fiberoi the wood is v.ery-slightly upset,

The twosemigrooves 3 and 4.ar e both convex across the nose of the pliers, as seen in Fig. 6, so that'th'e hammer-shank is upset to greater degree than in the case of grooves '1 and 2. v In case of a twisted hammer-shank,whichcannotbe bothbent and twisted to pro er osition twisted and set Withthe greater ressure of wood and cause the shank to maintain its 0- sition. function'in s acing the back-checks, as the grooves stra dle the bridle wire and permits the shankof theLback-check to'be seized by 'thenose of the pliers. The nose of the pliers may also be used fora key-plier for ing and engaging the key-mortises; For this and so sets the shank in the position assumed,

and set withgrooves 1 and 2, t e s ank is grooves 3 and 4, which upset the her of the spreada semigroove 2.01; the the I shank must be bent and pressure is exerted. This bends the shank, and at the same time These grooves also have .anot er purpose one member of thefnose js reduced in member 6 is of a flat spheroidal shape-that size to enter the mortise and flithe' opposing is, convex in all"directions, 'sdas'to give a q as firm-grasp. of the mateiial of the key whatever the obliquity of the mortise may be.

each member of thepliers, orthe cutters may bagrranged' as shown in'Figs. 10 and 11 and .75and 8 represent cutting edges, one'on" are sufficiently apparent witheutfurther de-' scription. I

9 is a deep notch or recess in the endtof handle 10,and 11 is a long screw provided tionijto register with th notch 9. These ing the screw lito the "position shown in dott ed lines in Fig. 1, with the nut on the outin the side of the handle adjacent to it an obliqile notch 16 for the purpose of engaging with a nut 12, pivoted to handle 13 in posi-.

parts cooperate with the ,.'close of the. pliers and the grooves therein as tollo'ws: Byswing ing the back-checks.

' ing a nose comprising two members movali-l .toward and from each other and providedi 2o registering grooves across the abutting shank engaged by the to the back-check shanks in spacing and ad'ust- Ad acent to note '16 is alarger notch 17to pass the bridle-wire.

claim 1 a 1., A piano-tool in plier form, having registering grooves across the nose-thereof,- one .of said grooves being concave and the other canvex across the plier, whereby a hammer:

substantially'as set forth.

2. A piano-tool in plier form, having registering grooves, one concave and' the other convex across the'plier', the convexitybeing greater than the concavity, whereby a hammer-shank engaged by the grooves will "b bent and set, substantially as set forth. 3. -A toolof the character described,fhav

' es thereof, one of said'grooves being coneand the other convex.

members movable other, and the wider'inember having a convex working face'a'nd re istering grooves in the said fiat members 0 the working faces thereof.

5. A piano-tool in pligr form, having a nose consisting of two substantially fiat members movable toward one member having less surface area than the other, and the larger member havin its;

1 working face convex in all directions an 'i'eg- 7. A tool of the character described, comprising two members movable toward and grooves will be bent,-

" wo *anot er, the. dies at one side comprisinga concave seat and a centralpressmg-face and I A toolof thecharac'ter described, havf in a nose comprising two substantially flat toward and from each other, one member being narrower than the the nose in rear ofand -from each other,

- ing hand-pliers havin e grooves in the other member befrom each other and provided with two pairs of registering grooves across the abutting faces thereof, the grooves of one pair being res ectively concave and convex and those' of t e other pair being convex.

8. A tool of the class described having two-lpairs of bending-faces adjacent to one anot el one air comprising a concave seat and a centra pressing-face and the other com rising a convex seat and a central press-i ingto bend the material operated u onin one direction when. operating with t e concave ing the convex seat. s

9. A device of the'class described having airs of bending-faces. adjacent to one the dies upon the opposite side comprising, a convexse'at and a pressingface, whereby the material operated upon car be bent in either direction without turning-it over.

10. A tool of the class described having two pairs of bendmg-face's adjacent to one another, one pair comprisiil-g -a concave seatgrooved to steady the material and a p'ress-.

mg-face opposite thereto, and the other pair comprising aconvex seat the material and a rssing-face op osite thereto, the seats and ressing-faces eing adapted respectively to end the material in opposite directions, substantiallyas herein .set forth.

11. A tool of g in the opposed aws ace, such faces being shaped respectively the class described ris seat, and in the otheridirection when operatgrooved to steady I two pairs of bending-dies adjacent to one an other, the dies upon one face. com rising a concave seat and a ressingface, an the dies upon the opposite ace comprising a convex seat and apressing-face,whereby the mate rial operated upon rection without turning it'over.

' JULIUS N. BROWN. Witnesses:

WM. S. BA'rEs,

can be bent in either di- ELLA. ELLIOTT. 

